diff --git a/dbsim/CMakeLists.txt b/dbsim/CMakeLists.txt
index dea6aa8..b0cd756 100644
--- a/dbsim/CMakeLists.txt
+++ b/dbsim/CMakeLists.txt
@@ -7,6 +7,7 @@ add_executable(dbsim
   db_client_service.cpp
   db_params.cpp
   db_server.cpp
+  db_server_service.cpp
   db_server_state.cpp
   db_simulator.cpp
   db_storage_engine.cpp
diff --git a/dbsim/db_server.cpp b/dbsim/db_server.cpp
index 430ea72..8fd1b5a 100644
--- a/dbsim/db_server.cpp
+++ b/dbsim/db_server.cpp
@@ -3,6 +3,7 @@
 //
 
 #include "db_server.hpp"
+#include "db_server_service.hpp"
 #include "db_client.hpp"
 #include "db_simulator.hpp"
 
@@ -16,7 +17,9 @@ db::server::server(simulator& simulator,
     , storage_engine_(simulator_.params())
     , mutex_()
     , cond_()
-    , server_state_(*this, name, server_id, address, "dbsim_" + name + "_data")
+    , server_service_(*this)
+    , server_state_(*this, server_service_,
+                    name, server_id, address, "dbsim_" + name + "_data")
     , last_client_id_(0)
     , last_transaction_id_(0)
     , appliers_()
diff --git a/dbsim/db_server.hpp b/dbsim/db_server.hpp
index 9a79f60..ad89a9d 100644
--- a/dbsim/db_server.hpp
+++ b/dbsim/db_server.hpp
@@ -10,6 +10,7 @@
 
 #include "db_storage_engine.hpp"
 #include "db_server_state.hpp"
+#include "db_server_service.hpp"
 
 #include <boost/thread.hpp>
 
@@ -51,6 +52,7 @@ namespace db
         db::storage_engine storage_engine_;
         wsrep::default_mutex mutex_;
         wsrep::default_condition_variable cond_;
+        db::server_service server_service_;
         db::server_state server_state_;
         std::atomic<size_t> last_client_id_;
         std::atomic<size_t> last_transaction_id_;
diff --git a/dbsim/db_server_service.cpp b/dbsim/db_server_service.cpp
new file mode 100644
index 0000000..ea800a8
--- /dev/null
+++ b/dbsim/db_server_service.cpp
@@ -0,0 +1,60 @@
+//
+// Copyright (C) 2018 Codership Oy <info@codership.com>
+//
+
+#include "db_server_service.hpp"
+#include "db_server.hpp"
+
+#include "wsrep/logger.hpp"
+
+db::server_service::server_service(db::server& server)
+    : server_(server)
+{ }
+
+wsrep::client_state* db::server_service::local_client_state()
+{
+    return server_.local_client_state();
+}
+
+wsrep::client_state* db::server_service::streaming_applier_client_state()
+{
+    return server_.streaming_applier_client_state();
+}
+
+void db::server_service::release_client_state(
+    wsrep::client_state* client_state)
+{
+    server_.release_client_state(client_state);
+}
+
+bool db::server_service::sst_before_init() const
+{
+    return false;
+}
+
+std::string db::server_service::sst_request()
+{
+    return server_.server_state().id();
+}
+
+int db::server_service::start_sst(
+    const std::string& request, const wsrep::gtid& gtid, bool bypass)
+{
+    server_.donate_sst(request, gtid, bypass);
+    return 0;
+}
+
+void db::server_service::background_rollback(wsrep::client_state&)
+{
+}
+
+void db::server_service::log_dummy_write_set(
+    wsrep::client_state&, const wsrep::ws_meta& meta)
+{
+    wsrep::log_info() << "Dummy write set: " << meta.seqno();
+}
+
+void db::server_service::log_view(wsrep::client_state&, const wsrep::view&)
+{
+    wsrep::log_info() << "View";
+}
diff --git a/dbsim/db_server_service.hpp b/dbsim/db_server_service.hpp
new file mode 100644
index 0000000..3deee8b
--- /dev/null
+++ b/dbsim/db_server_service.hpp
@@ -0,0 +1,33 @@
+//
+// Copyright (C) 2018 Codership Oy <info@codership.com>
+//
+
+#ifndef WSREP_DB_SERVER_SERVICE_HPP
+#define WSREP_DB_SERVER_SERVICE_HPP
+
+#include "wsrep/server_service.hpp"
+#include <string>
+
+namespace db
+{
+    class server;
+    class server_service : public wsrep::server_service
+    {
+    public:
+        server_service(db::server& server);
+        wsrep::client_state* local_client_state() override;
+        wsrep::client_state* streaming_applier_client_state() override;
+        void release_client_state(wsrep::client_state*) override;
+        bool sst_before_init() const override;
+        int start_sst(const std::string&, const wsrep::gtid&, bool) override;
+        std::string sst_request() override;
+        void background_rollback(wsrep::client_state&) override;
+        void log_dummy_write_set(wsrep::client_state&, const wsrep::ws_meta&)
+            override;
+        void log_view(wsrep::client_state&, const wsrep::view&) override;
+    private:
+        db::server& server_;
+    };
+}
+
+#endif // WSREP_DB_SERVER_SERVICE_HPP
diff --git a/dbsim/db_server_state.cpp b/dbsim/db_server_state.cpp
index 65bde2b..7895b6b 100644
--- a/dbsim/db_server_state.cpp
+++ b/dbsim/db_server_state.cpp
@@ -7,50 +7,3 @@
 
 #include "wsrep/logger.hpp"
 
-wsrep::client_state* db::server_state::local_client_state()
-{
-    return server_.local_client_state();
-}
-
-wsrep::client_state* db::server_state::streaming_applier_client_state()
-{
-    return server_.streaming_applier_client_state();
-}
-
-void db::server_state::release_client_state(
-    wsrep::client_state* client_state)
-{
-    server_.release_client_state(client_state);
-}
-
-bool db::server_state::sst_before_init() const
-{
-    return false;
-}
-
-std::string db::server_state::sst_request()
-{
-    return id();
-}
-
-int db::server_state::start_sst(
-    const std::string& request, const wsrep::gtid& gtid, bool bypass)
-{
-    server_.donate_sst(request, gtid, bypass);
-    return 0;
-}
-
-void db::server_state::background_rollback(wsrep::client_state&)
-{
-}
-
-void db::server_state::log_dummy_write_set(
-    wsrep::client_state&, const wsrep::ws_meta& meta)
-{
-    wsrep::log_info() << "Dummy write set: " << meta.seqno();
-}
-
-void db::server_state::log_view(wsrep::client_state&, const wsrep::view&)
-{
-    wsrep::log_info() << "View";
-}
diff --git a/dbsim/db_server_state.hpp b/dbsim/db_server_state.hpp
index 83cbf74..e045751 100644
--- a/dbsim/db_server_state.hpp
+++ b/dbsim/db_server_state.hpp
@@ -6,6 +6,7 @@
 #define WSREP_DB_SERVER_CONTEXT_HPP
 
 #include "wsrep/server_state.hpp"
+#include "wsrep/server_service.hpp"
 #include "wsrep/client_state.hpp"
 
 #include <atomic>
@@ -17,13 +18,15 @@ namespace db
     {
     public:
         server_state(db::server& server,
-                       const std::string& name,
-                       const std::string& server_id,
-                       const std::string& address,
-                       const std::string& working_dir)
+                     wsrep::server_service& server_service,
+                     const std::string& name,
+                     const std::string& server_id,
+                     const std::string& address,
+                     const std::string& working_dir)
             : wsrep::server_state(
                 mutex_,
                 cond_,
+                server_service,
                 name,
                 server_id,
                 address,
@@ -33,16 +36,6 @@ namespace db
             , cond_()
             , server_(server)
         { }
-        wsrep::client_state* local_client_state() override;
-        wsrep::client_state* streaming_applier_client_state() override;
-        void release_client_state(wsrep::client_state*) override;
-        bool sst_before_init() const override;
-        int start_sst(const std::string&, const wsrep::gtid&, bool) override;
-        std::string sst_request() override;
-        void background_rollback(wsrep::client_state&) override;
-        void log_dummy_write_set(wsrep::client_state&, const wsrep::ws_meta&)
-            override;
-        void log_view(wsrep::client_state&, const wsrep::view&) override;
     private:
         wsrep::default_mutex mutex_;
         wsrep::default_condition_variable cond_;
diff --git a/include/wsrep/server_service.hpp b/include/wsrep/server_service.hpp
index 596123d..2dd5a61 100644
--- a/include/wsrep/server_service.hpp
+++ b/include/wsrep/server_service.hpp
@@ -2,6 +2,7 @@
 // Copyright (C) 2018 Codership Oy <info@codership.com>
 //
 
+
 /** @file server_service.hpp
  *
  * An abstract interface for a DBMS server services.
@@ -9,6 +10,11 @@
  * the wsrep-lib.
  */
 
+#ifndef WSREP_SERVER_SERVICE_HPP
+#define WSREP_SERVER_SERVICE_HPP
+
+#include <string>
+
 namespace wsrep
 {
     class client_state;
@@ -99,3 +105,5 @@ namespace wsrep
 
     };
 }
+
+#endif // WSREP_SERVER_SERVICE_HPP
diff --git a/include/wsrep/server_state.hpp b/include/wsrep/server_state.hpp
index 36fd70a..6d68f69 100644
--- a/include/wsrep/server_state.hpp
+++ b/include/wsrep/server_state.hpp
@@ -87,7 +87,7 @@ namespace wsrep
      *
      *
      */
-    class server_state : public wsrep::server_service
+    class server_state
     {
     public:
         /**
@@ -157,6 +157,9 @@ namespace wsrep
 
 
         virtual ~server_state();
+
+
+        wsrep::server_service& server_service() { return server_service_; }
         /**
          * Return human readable server name.
          *
@@ -347,6 +350,7 @@ namespace wsrep
          */
         server_state(wsrep::mutex& mutex,
                      wsrep::condition_variable& cond,
+                     wsrep::server_service& server_service,
                      const std::string& name,
                      const std::string& id,
                      const std::string& address,
@@ -354,6 +358,7 @@ namespace wsrep
                      enum rollback_mode rollback_mode)
             : mutex_(mutex)
             , cond_(cond)
+            , server_service_(server_service)
             , state_(s_disconnected)
             , state_waiters_(n_states_)
             , streaming_appliers_()
@@ -375,6 +380,7 @@ namespace wsrep
 
         wsrep::mutex& mutex_;
         wsrep::condition_variable& cond_;
+        wsrep::server_service& server_service_;
         enum state state_;
         mutable std::vector<int> state_waiters_;
         typedef std::map<std::pair<wsrep::id, wsrep::transaction_id>, wsrep::client_state*> streaming_appliers_map;
@@ -391,15 +397,15 @@ namespace wsrep
     class client_deleter
     {
     public:
-        client_deleter(wsrep::server_state& server_state)
-            : server_state_(server_state)
+        client_deleter(wsrep::server_service& server_service)
+            : server_service_(server_service)
         { }
         void operator()(wsrep::client_state* client_state)
         {
-            server_state_.release_client_state(client_state);
+            server_service_.release_client_state(client_state);
         }
     private:
-        wsrep::server_state& server_state_;
+        wsrep::server_service& server_service_;
     };
 
     static inline std::string to_string(enum wsrep::server_state::state state)
diff --git a/include/wsrep/transaction.hpp b/include/wsrep/transaction.hpp
index 756b147..177243b 100644
--- a/include/wsrep/transaction.hpp
+++ b/include/wsrep/transaction.hpp
@@ -137,6 +137,7 @@ namespace wsrep
         void debug_log_state(const char*) const;
 
         wsrep::provider& provider_;
+        wsrep::server_service& server_service_;
         wsrep::client_state& client_state_;
         wsrep::transaction_id id_;
         enum state state_;
diff --git a/src/server_state.cpp b/src/server_state.cpp
index 2aced47..fa13f55 100644
--- a/src/server_state.cpp
+++ b/src/server_state.cpp
@@ -173,7 +173,7 @@ int wsrep::server_state::on_apply(
         assert(not_replaying);
         assert(find_streaming_applier(
                    ws_meta.server_id(), ws_meta.transaction_id()) == 0);
-        wsrep::client_state* sac(streaming_applier_client_state());
+        wsrep::client_state* sac(server_service_.streaming_applier_client_state());
         start_streaming_applier(
             ws_meta.server_id(), ws_meta.transaction_id(), sac);
         sac->start_transaction(ws_handle, ws_meta);
@@ -191,7 +191,7 @@ int wsrep::server_state::on_apply(
             sac->after_command_before_result();
             sac->after_command_after_result();
         }
-        log_dummy_write_set(client_state, ws_meta);
+        server_service_.log_dummy_write_set(client_state, ws_meta);
     }
     else if (ws_meta.flags() == 0)
     {
@@ -219,7 +219,7 @@ int wsrep::server_state::on_apply(
             sac->after_command_before_result();
             sac->after_command_after_result();
         }
-        log_dummy_write_set(client_state, ws_meta);
+        server_service_.log_dummy_write_set(client_state, ws_meta);
     }
     else if (commits_transaction(ws_meta.flags()))
     {
@@ -251,7 +251,7 @@ int wsrep::server_state::on_apply(
                 sac->after_command_after_result();
                 stop_streaming_applier(
                     ws_meta.server_id(), ws_meta.transaction_id());
-                release_client_state(sac);
+                server_service_.release_client_state(sac);
             }
         }
         else
@@ -273,16 +273,6 @@ int wsrep::server_state::on_apply(
     return ret;
 }
 
-#if 0
-bool wsrep::server_state::statement_allowed_for_streaming(
-    const wsrep::client_state&,
-    const wsrep::transaction&) const
-{
-    /* Streaming not implemented yet. */
-    return false;
-}
-#endif
-
 void wsrep::server_state::start_streaming_applier(
     const wsrep::id& server_id,
     const wsrep::transaction_id& transaction_id,
diff --git a/src/transaction.cpp b/src/transaction.cpp
index c802521..1abded8 100644
--- a/src/transaction.cpp
+++ b/src/transaction.cpp
@@ -24,6 +24,7 @@
 wsrep::transaction::transaction(
     wsrep::client_state& client_state)
     : provider_(client_state.provider())
+    , server_service_(client_state.server_state().server_service())
     , client_state_(client_state)
     , id_(transaction_id::invalid())
     , state_(s_executing)
@@ -635,7 +636,7 @@ bool wsrep::transaction::bf_abort(
             // rollbacker gets control.
             state(lock, wsrep::transaction::s_aborting);
             lock.unlock();
-            client_state_.server_state().background_rollback(client_state_);
+            server_service_.background_rollback(client_state_);
         }
     }
     return ret;
@@ -721,8 +722,8 @@ int wsrep::transaction::certify_fragment(
     // std::auto_ptr<wsrep::client_state> sr_client_state(
     //    client_state_.server_state().local_client_state());
     wsrep::scoped_client_state<wsrep::client_deleter> sr_client_state_scope(
-        client_state_.server_state().local_client_state(),
-        wsrep::client_deleter(client_state_.server_state()));
+        server_service_.local_client_state(),
+        wsrep::client_deleter(server_service_));
     wsrep::client_state& sr_client_state(
         sr_client_state_scope.client_state());
     wsrep::client_state_switch client_state_switch(
@@ -928,7 +929,7 @@ void wsrep::transaction::streaming_rollback()
 {
     assert(streaming_context_.rolled_back() == false);
     wsrep::client_state* sac(
-        client_state_.server_state().streaming_applier_client_state());
+        server_service_.streaming_applier_client_state());
     client_state_.server_state().start_streaming_applier(
         client_state_.server_state().id(), id(), sac);
     sac->adopt_transaction(*this);
diff --git a/src/wsrep_provider_v26.cpp b/src/wsrep_provider_v26.cpp
index 6b77365..2f0f67e 100644
--- a/src/wsrep_provider_v26.cpp
+++ b/src/wsrep_provider_v26.cpp
@@ -289,7 +289,7 @@ namespace
 
         try
         {
-            std::string req(server_state.sst_request());
+            std::string req(server_state.server_service().sst_request());
             *sst_req = ::strdup(req.c_str());
             *sst_req_len = strlen(req.c_str());
             return WSREP_CB_SUCCESS;
@@ -369,7 +369,7 @@ namespace
             wsrep::gtid gtid(wsrep::id(req_gtid->uuid.data,
                                        sizeof(req_gtid->uuid.data)),
                              wsrep::seqno(req_gtid->seqno));
-            if (server_state.start_sst(req, gtid, bypass))
+            if (server_state.server_service().start_sst(req, gtid, bypass))
             {
                 return WSREP_CB_FAILURE;
             }
diff --git a/test/mock_server_state.hpp b/test/mock_server_state.hpp
index 3b8a8df..b3884c8 100644
--- a/test/mock_server_state.hpp
+++ b/test/mock_server_state.hpp
@@ -13,13 +13,15 @@
 
 namespace wsrep
 {
-    class mock_server_state : public wsrep::server_state
+    class mock_server_state
+        : public wsrep::server_state
+        , public wsrep::server_service
     {
     public:
         mock_server_state(const std::string& name,
                             const std::string& id,
                             enum wsrep::server_state::rollback_mode rollback_mode)
-            : wsrep::server_state(mutex_, cond_,
+            : wsrep::server_state(mutex_, cond_, *this,
                                     name, id, "", "./", rollback_mode)
             , mutex_()
             , cond_()